Homemade battery. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Chargers, batteries, galvanic cells
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As children, we made very simple batteries ourselves. Activated charcoal was removed from gas masks. Small bags were sewn from ladies' stockings. Graphite rods were pulled out of the batteries.
The bags were filled with coal and, after inserting the rods with wires soldered to them, they tied them with threads for better contact (see figure).
Salted water served as the electrolyte. Despite the simplicity and cheapness of batteries (chemists call them gas batteries) work satisfactorily. It is only necessary that the electrodes do not touch each other and the bottom, otherwise the bags will become unusable.
If the battery deteriorates its performance, replace the electrolyte. Thankfully it's cheap.
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